Carbureter



A. I OOMIS. CARBURE'TER.

- APPLICATION FILED NOV, I3, 1915. 1,399,65 Patfnted Dec. 6, 1921.

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WLZ l7765s Al LOOMIS.

CABBURETER.

APPLICATION FILED Nov; I3, I9I5.

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Patented Dec. 6

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ALLEN`LOOMIS, OF DETROIT, MICHIGAN',- ASSIGNOR TO PACKARD MOTOR CAR COM- PANY, DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

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Specicaton of Letters Patent.

Patented nee. e, rear.

Application filed November 13, 1915. Serial No. 61,282.

To aZZ whom t may concer/n v Be it known that I, ALLEN LooMI's, a citizen of the `United States, and resident of Detroit, lVayne county, State of Michigan, have invented certain new and useful Improvements in Carbureters, ofA which the following is a specification.

This invention relates to carbureters for hydrocarbon motors.

One of the objects of the invention 1s to provide a carbureter in which the gases pass downwardly therethrough.

Another object of the'invention is to provide a carbureter with aVenturitube and a gasolene nozzle havi-ng'side openings. 4

Another object is to provlde a drain for a carbureter which has its mixture outlet at the lower part of the mixing chamber.

,A further )object i's to provide an automatically closed drain for a carbureter.

Other objects of the invention will appear from the following description taken in connection with the drawings which form a part of this specification and in which:

Figure 1 .is a front elevation of'a motor and carbureter embodying this invention;

Fig. 2 is an enlarged transverse-section of the carbureter shown in Fig. l;

Fig. 3 is a section on the lines 2; and a Fig. 4 is a sectional view of another form of carbureten Referring to the'drawings, it 'will be seen that a carbureter is shown as applied to a motor of the V.-type, but it will be understood that some of the features of this invention may be used with other types of motors.

v Referring particularly toFig. l, 10 indicates one of the side members of a frame of 3 3 gf Fig.

a motor vehicle upon which a V-type motorl 11 is mounted. This V-type motor is provided with twosets of cylinders 12, 13, and a carbureter 14 is mounted between Athe cylinders and connected therewith through passages or conduits 15 and an inlet manifold or conduit 16, said manifold being'shown as formed integrally rwith the cylinder castings.

Said latter conduit 16 leads through a port 16 into the interior of the cylinder, and said port is shown as Vclosed by the usual puppet valve 16". InFig. .1, the right-hand cylinder casting is broken away to illustrate these conduits, and it`wll. be understood that there a supplementary or auxiliary air inlet piece 19 which forms an extension on one side of the body portion of the carbureter and which communicates with the`mixingchamber, a fuel or gasolene nozzle 21 which extends upvwardly intothe mixture tube, and one or more mixture' outletsor passages 15, which latter have been heretofore referred to.-

, I-t will be understood that the upper end of the Venturi tube 24 is alwaysl open to the atmosphereV through the openings 1`8\ in the inlet piece 18. Also, the interior of the body of the carbureter communicates through the outlets 15 and conduits 161with the motor cylinders. The auxiliary air inlet 19 is controlled by the usual puppet valve '19 and springs 19. e

From the above description, it will be seen that' the suction created in the motor cylinders will cause air to be drawn through the inlets 18 and 19, the Venturi tube 24, the

body of the carbureter, and the conduits 15 and 16 into the motor cylinders. As the air drawn through Ithe inlet 18 passes openings 23 in'the upper part of the nozzle 21, fuel or gasolene is picked upand carbureted to form the combustible mixture. The openings 23 are arranged in the side of the nozzle so that the downward pressure of the air passing through the Venturi tube willl not affect the feedv of gasolenethrough the nozzle. As shown, these openings 23 are four in number, arranged around the nozzle in substantially the same.' horizontal` plane, and approximately at the most constricted portion of the Venturi tube. Thus, the openings are arranged at the point where the air is pass# ing at its greatest speed.

vThe nozzle 21 is suitably mounted in the of the carburetor, and itsfinterior .is

l through a valve chamber 35 to a 45 forms a nozzle 41.

valves 27 are provided. lThe usual butterfly throttles are shown, and they are connected for simultaneous operation by arms 31 on the pins 28, upon'which the throttles are 5 mounted, links 32, and arms 30 on a rod 29.

gasolene that may condense or otherwise collect in the mixing chamber of the carbureter, a drain is provided from each of the outlets or passages l5. These drains, indicated at 33, connect at 34 and pass pipe 36 which extends to adjacent the bottom ofthe motor as shown in F ig. l. Since the drains connect with the carbureter on the Suction side of the Venturi tube they would seriously interfere with the mixture if left open when the motor is running. To' automatically close these drains a valve 37 is arranged in the chamber 35 and a spring 38 supports the valve slightly off its seat so that the ports 39 are open when the valve is at rest as shown in Fig. 2. In that position, which is the position of the valve when the motor is not running, the condensed` gasolene may drain from the walls of the mixv ing chamberthrough the drains 33, ports 39,

and pipe 36 to the ground. When the motor is running, however, there is always suction or a partial vacuum in the passagesi'l with which the drains connect and the valve 37 is therefore drawn up against its seat and` closes the ports 39 so that no air can be drawn in through the drains to affect the mixture in the carbureter.

Fig. 4 showsl another form of carbureter. 40 in which the size of the opening in the gasolene nozzle may be adjusted and in which a single throttle valve is employed. The fuel is fed from the float chamber 17 by meansof a tube 40 which turns at right angles and This nozzle terminates j. within the Venturi tube 24 and has its end closed by an adjustable screw 44 threaded into a projection 42 in the nozzle.

The size of the side opening left between the head of the screw and the nozzle may be adjusted by varying the position of the screw.

Below the Venturi tube and the nozzle is mountedl a single throttle Valve 46 for regulating the amount of mixture to be Supplied to the engine. This valve is ofthe usual form and may be operated by an arm 48.

Specific embodiments have been shown and described but it is to be understood that the invention is not limited thereto and that other embodiments may be made without departing from the spirit or scope of the invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In a carbureter the combination of an air inlet, two mixture outlets below said inlet, a Venturi tube extending downwardly from said inlet, ai cross member between said outlets and a gasolene nozzle mounted on and extending upwardly from said cross member into` said Venturi tube.

2. In a earbureter, the combination of an air inlet, two mixture outlets below lsaid inlet, a Venturi tube extending downwardly from said inlet, a cross member between said outlets, a gasolene nozzle mounted on and extending upwardly from said cross member into said Venturi tube, and a drain for condensed gasolene between= said outlets and below said cross member.

3. In a carbureter, the combination of an air inlet. two mixture outlets below said inlet, aVenturi tube extending downwardly from said inlet, a cross member betweensaid outlets, a gasolene nozzle mounted on and extendingupwardly from said cross member into said Venturi tube, a drain for condensedI gasolene between said outlets and below said cross member" and throttle Valves for each outlet at either side of said cross member.

In 'testimony whereof'I aiiix my si nature.

ALLEN LOO IS. 

